Surgical Forceps Blade Locking Mechanism for Precise Tissue Division
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Solution Overview
Problem
Existing surgical forceps lack efficient mechanisms for sealing and dividing tissue, particularly in procedures requiring precise electrosurgical energy control and gap distance, and often require manual vessel severing post-sealing.
Innovation Solution
The forceps incorporate a blade deployment mechanism with a trigger assembly and interference member that allows controlled translation of a blade through jaw members, enabling precise tissue cutting, and an actuator for electrosurgical energy application, ensuring seamless tissue sealing and division.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a blade member is incorporated to sever tissue after sealing, then tissue division capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the sealing function and cutting function into a single integrated forceps device. The jaw members perform both electrosurgical sealing and the blade member performs cutting, both within the same device structure, eliminating the need for separate instruments and reducing overall procedural complexity.
Solution Approach 2:
The forceps device is designed with multi-functionality, where the jaw members can both seal tissue through electrosurgical energy and the integrated blade member can sever tissue. This universal design allows a single device to perform multiple surgical tasks that would otherwise require separate instruments.
2Measurement precision
If a trigger assembly with interference member is used to control blade deployment, then blade deployment precision is improved, but device complexity increases
Solution Approach 1:
The interference member acts as an intermediary mechanism between the trigger assembly and the blade member. It controls the timing and precision of blade deployment by engaging with the linkage system, ensuring the blade is deployed only when the jaw members are properly closed and secured, thus providing precise control without requiring complex electronic systems.
Solution Approach 2:
The trigger assembly with interference member provides self-service control for blade deployment. The mechanical linkage and interference member work together to automatically control blade timing based on jaw closure, eliminating the need for separate control systems or additional actuators, thus achieving precision control with relatively simple mechanical components.
3Manufacturing precision
If blade reciprocation through jaw members is implemented, then tissue cutting accuracy is improved, but device complexity increases
Solution Approach 1:
The blade member is designed to reciprocate through the jaw members rather than moving in a single direction. This dynamic motion allows the blade to accurately track through the tissue along the sealed area, improving cutting precision by maintaining consistent contact and alignment with the tissue seal while the jaw members remain closed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism facilitates precise tissue sealing and division by allowing controlled blade deployment and electrosurgical energy application, enhancing surgical efficiency and accuracy.
Implementation Method 1
a biasing member is provided for biasing the blade toward the retracted position
Implementation Method 2
The interference member may also be biased toward the locked position
Data Source
AI summary
A forceps includes first and second shafts, each having a jaw member disposed at a distal end thereof. At least one jaw member is moveable from an open to a closed position for grasping tissue therebetween. At least one jaw member is configured for reciprocation of a blade therethrough. A trigger assembly includes a trigger and at least one linkage coupled to the trigger and to the blade such that rotation of the trigger translates the blade between the retracted and the extended position. An interference member moveable between a locked position and an unlocked position is also provided. The interference member is configured to engage the linkage(s) when in the locked position to inhibit translation of the blade from the retracted to the extended position.